21.6.8 Events

If the Event Output Enable bit in the Event Control register (EVCTRL.CFDEO) is set, the CFD clock failure will be output on the Event Output and event line will go high. When the CFD is switched to the safe clock, the CFD clock failure will not be output on the Event Output.

The CFD can generate the following output event:

• Clock Failure Detector (XOSC32KFAIL): Generated when the Clock Failure Detector status bit is set in the Status register (STATUS.XOSC32KFAIL). The CFD event is not generated when the Clock Switch bit (STATUS.XOSC32KSW) in the Status register is set.

Writing a '1' to an Event Output bit in the Event Control register (EVCTRL.CFDEO) enables the CFD output event. Writing a '0' to this bit disables the CFD output event. Refer to the Event System chapter for details on configuring the event system.